Caldwell County Louisiana has 9 places on the National Register of Historic Places including 3 places of Statewide significance. Significant places include Breston Plantation House, Landerneau Mound and Shepis Building, Blanks House and Downtown Columbia Historic District dating back to 0.
Some of the country's most noteable architects helped create the Caldwell County places including Nicholas John Shepis, Alfred Ferrand, Frank Masselin and Monroe Masselin. Prominent architectural styles found in Caldwell Country are Greek Revival, Bungalow/Craftsman and Gothic.